package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /*
     * 修改 分类
     * @param categoryDTO
     * */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        // 将参数的属性复制到category对象中
        BeanUtils.copyProperties(categoryDTO, category);
//        category.setUpdateTime(LocalDateTime.now());
//        // 设置更新人
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }


    /*
     * 分类分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     * */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        // 开启分页
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());

        // 获取分页结果
        Page<Category> pageResult = categoryMapper.pageQuery(categoryPageQueryDTO);

        // 返回结果
        return new PageResult(pageResult.getTotal(), pageResult.getResult());
    }

    /*
     * 新增 分类
     * @param categoryDTO
     * */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        category.setStatus(StatusConstant.DISABLE);
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.insert(category);
    }


    /*
     * 分类列表
     * @param type
     * @return
     * */
    @Override
    public List<Category> list(Integer type) {
        List<Category> list = categoryMapper.list(type);
        return list;
    }

    /*
     * 启用禁用 分类
     * @param status
     * @param id
     * */
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category =  Category.builder()
                .id( id)
                .status( status).build();
        categoryMapper.update(category);
    }

    /*
     * 删除 分类
     * @param id
     * */
    @Override
    public void delete(Long id) {
        // 判断当前分类是否关联了菜品，如果已经关联，则无法删除
        int dishCount = dishMapper.countByCategoryId(id);
        if (dishCount > 0) {
            // 当前分类下有菜品，无法删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        // 判断当前分类是否关联了套餐，如果已经关联，则无法删除
        int setmealCount = setmealMapper.countByCategoryId(id);
        if (setmealCount > 0) {
            // 当前分类下有套餐，无法删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);

    }
}
